Note 21 - Parent Company Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and due from banks	$ 8,388	$ 8,858
Federal funds sold	1,138	18,990
Other assets	9,492	9,948
Total assets	706,290	680,284
Other liabilities	3,519	2,705
Common stock
Surplus	40,752	41,660
Retained earnings	41,600	35,929
Accumulated other comprehensive loss	(924)	(1,967)
Total stockholders’ equity	81,428	75,622	$ 57,182
Total liabilities and stockholders’ equity	706,290	680,284
Parent Company [Member]
Cash and due from banks	52	1,409
Federal funds sold	532
Investment in affiliate bank	80,587	73,813
Other assets	326	468
Total assets	81,497	75,690
Other liabilities	69	68
Common stock
Surplus	40,752	41,660
Retained earnings	41,600	35,929
Accumulated other comprehensive loss	(924)	(1,967)
Total stockholders’ equity	81,428	75,622
Total liabilities and stockholders’ equity	$ 81,497	$ 75,690